国内很多服务器提供商都默认禁止了smtp默认的25端口服务，而启用465端口发送邮件

在smtplib库中直接调用SMTP_SSL就是默认使用465端口

示例代码如下：

def send_eamil(receiver):
global msg
sender = 'xxx@163.com'
psd = 'xxx' #是授权密码不是邮箱登录密码
mail_host='smtp.163.com'
subject='xxx'
to_addrs=receiver.split(',')
#创建带附件的实例
msg=MIMEMultipart()
msg['Subject']=Header(subject,'utf-8')
msg['from']=Header(sender,'utf-8')
msg['To']=",".join(to_addrs) #多个收件人
#创建正文，把文本添加到msg类中
msg.attach(MIMEText('Push test','plain','utf-8'))
print('set ok')

#构造附件

file_path='文件路径'

att1=MIMEText(open(file_path,'rb').read(),

'base64','utf-8')

#att1["Content-Type"]='application/octet-stream;name=%s'%Header(filename,'utf-8').encode('utf-8') #与下边功能一致

#att1["Content-Disposition"]='attachment;file_name=%s'%Header('%s'%filename,'utf-8').encode('utf-8') #与下边功能一致

att1.add_header('Content-Disposition', 'attachment', filename=名字随便起)#没有这三行会出现文件结尾变成bin现象

att1.add_header('Content-ID', '<0>')

att1.add_header('X-Attachment-Id', '0')

msg.attach(att1)#将附件添加到类文件

try:  
    smtp=SMTP\_SSL(mail\_host)  
    smtp.set\_debuglevel(1)  #显示发送过程  

smtp.connect(mail_host)

    print('connect ok')  
    smtp.login(sender,psd)  
    smtp.sendmail(sender,to\_addrs,msg.as\_string())  
    smtp.quit()  
    print('发送成功')  
except Exception as result:  
    print('发送失败，异常为%s'%result)

if __name__ == '__main__':

make_excel()

send\_eamil('xxx@xx.com')